Fixed a bug (at least, I hope so :-) ) which helped more RevWalk tests to pass  (before : 36 passed/30 failed. after : 58 passed/8 failed)
Fixed a bug (at least, I hope so :-) ) which helped more RevWalk tests to pass  (before : 36 passed/30 failed. after : 58 passed/8 failed)

henon/GitSharp,henon/GitSharp